/Engine/Source/Editor/Kismet/Public/BlueprintEditor.h
Called when an actor is dropped onto the graph editor
void OnGraphEditorDropActor ( const [TArray](API\Runtime\Core\Containers\TArray)< [TWeakObjectPtr](API\Runtime\Core\UObject\TWeakObjectPtr)< [AActor](API\Runtime\Engine\GameFramework\AActor) > > & Actors, [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * Graph, const FVector2D & DropLocation )